We look at the division of 661392 by 91 
We want to divide 661392 by 91.

Advancing to step 1:
6 divided by 91 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 91

Going ahead to step 2:
91 can be fit into 66 0 times, resulting in a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Take the next digit (1) from the dividend and append it to 66, then repeat: 661 / 91

Moving on to step 3:
The number 91 fits into 661 7 times, leaving a remainder of 24.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 637 from 661 and we're left with 24.
Include the next digit (3) from the dividend after 24, then repeat: 243 / 91

Let's proceed to step 4:
The number 91 fits into 243 2 times, leaving a remainder of 61.
Write down 2 as next digit of the result. 
Result so far: 72.0
The remainder is 61 after subtracting 182 from 243.
Include the next digit (9) from the dividend after 61, then repeat: 619 / 91

Step 5:
When dividing 619 by 91, we get 6 with a remainder of 73.
Record the quotient 6 as the next digit in the result. 
Result so far: 726.0
If we take 546 away from 619, we end up with 73.
Bring next digit (2) of the dividend behind the 73 and repeat the process: 732 / 91

Advancing to step 6:
The number 91 fits into 732 8 times, leaving a remainder of 4.
The next digit of our result is 8. 
Result so far: 7268.0
Deduct 728 from 732 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
91 can be fit into 40 0 times, resulting in a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 7268.0
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
When dividing 400 by 91, we get 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 7268.04
The remainder is 36 after subtracting 364 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 9:
91 can be fit into 360 3 times, resulting in a remainder of 87.
The number 3 becomes the next digit in our result. 
Result so far: 7268.043
If we subtract 273 from 360, we get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Let's proceed to step 10:
The number 91 fits into 870 9 times, leaving a remainder of 51.
Put 9 as the next digit of the answer. 
Result so far: 7268.0439
Subtracting 819 from 870 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 11:
When dividing 510 by 91, we get 5 with a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 7268.04395
If we subtract 455 from 510, we get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Going ahead to step 12:
91 goes into 550 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 7268.043956
If we subtract 546 from 550, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 13:
If we divide 40 by 91, we get 0 and a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 7268.043956
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 14:
When dividing 400 by 91, we get 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 7268.04395604
The remainder is 36 after subtracting 364 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

After the division, we end up with 7268.04395604 and a remainder of 3.6e-08.